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A kind of method for removing phosphorus from acid vanadium-containing solution

An acid and solution technology, applied in the field of phosphorus removal by acid vanadium-containing solution, can solve the problems of vanadium loss, high phosphorus content in vanadium extraction residues, unfavorable recycling of vanadium extraction residues, etc., and achieves the effect of small vanadium loss and large phosphorus concentration range.

Active Publication Date: 2017-10-17
PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, when the above two methods of phosphorus removal are applied to acidic vanadium-containing solutions, there are certain problems: the pH of the acidic vanadium-containing solution obtained by acid leaching of vanadium slag calcification and roasting clinker is generally in the range of 2.8-3.5, and when adjusted to 4.0-4.5 A large amount of precipitation will lead to loss of vanadium; if iron salt is used to remove phosphorus, the added ferric ions will form iron vanadate precipitation with vanadium, resulting in a large loss of vanadium; if zirconium salt is used to remove phosphorus, it needs to be carried out once during acid leaching Phosphorus removal leads to high phosphorus content in the vanadium extraction residue, which is not conducive to the internal recycling of the vanadium extraction residue in iron and steel enterprises, or the phosphorus concentration in the acidic vanadium-containing solution is high, and the solution cannot achieve the effect of deep phosphorus removal at one time.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Get 1000mL acidic vanadium-containing solution (pH=2.86, TV=1.94g / L, P=1.76g / L), add concentration and be 30% by weight of hydrogen peroxide aqueous solution 30mL (acidic vanadium-containing solution: H 2 o 2 =100ml: 0.9g) and zirconium sulfate 11.4g (molar ratio Zr / P=0.7), stirred at 50°C for 30min; adjusted the solution pH=3.5 with ammonium bicarbonate and stirred for 60min, left standing for 2h after the reaction, filtered to obtain the filtrate, Where TV=1.89g / L, P=0.027g / L (vanadium recovery rate 99%, phosphorus removal rate 98.5%).

Embodiment 2

[0028] Get 1000mL acidic vanadium-containing solution (pH=3.2, TV=6.72g / L, P=1.26g / L), add concentration and be 30% by weight of hydrogen peroxide aqueous solution 10mL (acidic vanadium-containing solution: H 2 o 2 =100ml: 0.3g) and zirconium sulfate 13.9g (molar ratio Zr / P=1.2), stirred at 40°C for 15min; adjusted the solution pH=3.0 with ammonium carbonate and stirred for 30min, left to stand for 2h after the reaction, and filtered to obtain the filtrate, wherein TV=6.64g / L, P=0.022g / L (vanadium recovery rate 99.3%, phosphorus removal rate 98.2%).

Embodiment 3

[0030] Get 1000mL acidic vanadium-containing solution (pH=3.44, TV=22.08g / L, P=0.47g / L), add concentration and be 50mL of hydrogen peroxide aqueous solution of 30% by weight (acidic vanadium-containing solution: H 2 o 2 =100ml: 1.5g) and zirconium sulfate 6.5g (molar ratio Zr / P=1.5), stirred at 30°C for 5min; adjusted the solution to pH=2.7 with ammonia water and stirred for 10min, left to stand for 2h after the reaction, and filtered to obtain the filtrate, wherein TV =21.31g / L, P=0.025g / L (vanadium recovery rate 98.9%, phosphorus removal rate 94.4%).

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Abstract

The invention relates to the field of phosphor removal of an acidic vanadium-containing solution, and discloses a method for carrying out phosphorus removal on the acidic vanadium-containing solution, wherein the method comprises the following step: under the condition with a pH value of 2.5-3.5, carrying out a contact process on the acidic vanadium-containing solution, hydrogen peroxide and zirconium sulfate. According to the method for carrying out phosphorus removal on the acidic vanadium-containing solution disclosed by the invention, the allowed concentration range of the acidic vanadium-containing solution is large, and the phosphor removal can be effectively carried out on the acidic vanadium-containing solution; moreover, the vanadium loss is relatively small when the phosphor removal is carried out.

Description

technical field [0001] The invention relates to a method for removing phosphorus from an acidic solution containing vanadium. Background technique [0002] Vanadium slag is the main raw material for producing vanadium oxide. At present, there are two main industrialized vanadium extraction processes, namely sodium roasting vanadium extraction process and calcification roasting vanadium extraction process. The vanadium slag used in industrial production is mainly ordinary vanadium slag, which is characterized by low CaO content, generally CaO / V 2 o 5 ≤0.15. However, for CaO / V 2 o 5 ≥0.16, P≥0.06% high-calcium and high-phosphorus vanadium slag, because the high CaO content leads to a large reduction in roasting conversion rate, it is not suitable to use sodium roasting-water leaching vanadium extraction process; if you want to use calcification roasting-sulfuric acid leaching Vanadium process treatment of high-calcium and high-phosphorus vanadium slag, it is first necessa...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B3/44C22B34/22
CPCY02P10/20
Inventor 付自碧高官金何文艺申彪彭毅张林
Owner PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP